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Alekssandra [29.7K]
3 years ago
6

If the sides of a square are lengthened by 7 feet, the area becomes 121 square feet. How long is a side of the original square?

Mathematics
2 answers:
Bogdan [553]3 years ago
5 0
Square root of 121 is 11.
11-7=4
A side of the original square is 4 feet.
patriot [66]3 years ago
5 0

Answer: The side of the original square is 4 feet.

Step-by-step explanation:

Given , the sides of the original square is lengthened by 7 feet.

The area of the new square = 121  square feet.

Let the original side of square be<em> 'x'.</em>

The new side = <em>x+7</em>

Area of new square =(side)² = <em>(x+7)²</em>

As per given , we have

(x+7)^2=121

\Rightarrow\ (x+7)^2=11^2\ \ \ [\because\ 11^2=121]

Taking square roots on both sides , we get

x+7=11\\\\\Rightarrow\ x=11-7=4

Hence, the side of the original square is 4 feet.

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